In march



W. E. BOCK.

ARTICLE camomo MACHINE.

APPLICATION FILED IAN. l9. Ill!- 1,310,386. Patented July 15, 1919.

M figs- L W. E. BOCK.

ARTICLE GRINDING MACHINE- m'ucmou mm an. n. my.

Patented J uly 15, 1919.

I5 SKINS-SM 3.

l5 SHINY-SHUT 4.

lutvntcd July 15, 1919.

W. L. BUCK.

ARTICLE ammo mcmm.

APPLICAHON HLID HAN. l9. l9ll.

w DNLM W. E. BUCK.

ARTICLE GRINDING MACHINE.

APPLICATION mm IAN. I9. I91] 1 ,31 0,386. Pater lted July 15, 1919.

L: SHEETS-SHEET 5.

W. E. BOCK. ARTICLE GRINDING MACHINE. APPLICATION nun IAR. u. my.

Patented July 15, 1919.

5 "HUS-NEH i.

ElEllilllll uvsmun W. E. BOCK.

ARTICLE cmumuc MACHINE.

APPLICKHOII LED "Al. I. 9|!- 1,310,386. Patented July 15, 1919.

. l5 HITS-Milt" W. E. BUCK. ARTICLE GRINDING MACHINE. APPLICATION mu)NM. U. ml.

1,3 1 0,386. Patenwd July 15, 1919.

\5 SHEETS-5M5! 9.

v INVEN'T'UR W. E. BUCK.

ARIICLE GRINOZNG MACHINE wvucmon mm MAR. 19. m1.

1 ,3 1 O, 388'. Patented July 15, 1919.

I5 SMLEYS SHH! ll.

' H5114 Fig. 15

INVE'NT'UR W. E. BOOK.

ARTICLE GRINDING MACHINE.

APPLICATION men mm. 19. ml.

Patented July 15, 1919.

15 SHEEI$-SHEET 12.

Fig. 22. Fig. 23 [7g 24 INVENT'UR @M MZW is m w. E. BOCK.

ARTICLE GRiNDlNG MACHINE.

APPLICATION FILED mm. [9. ml.

Patentcd 15, 1919.

15 SN --SHLET 13.

INVE'N'T'UH MMAM.

w. E. BOOK ARYICLE GRINDING MACHINE- APPLICATION flLlD AR. 9 li'l- 1,310,386. Patented July 15, 1919.

INVENTUR flown-9W UNITED STATES PATENT OFFICE WILLIAM EMIL BOCK FTOLEDO. OHIO. ASSIGNOR TO THE ROCK BEARING COMPANY. (INCORPORATED INOHIO IN MARCH. 1916.)

ARTICLE-GRINDING MACHINE.

Specification of Letter: Patent.

la-tentotl July 15, 1919.

Continuation of appltoation scrlal Ne. 6-1347. Med December 1, 1915.This application tiled March 19, 19". Serial No. 155.959.

To all whom. it may 1mm rn:

lla it known that I, \Vinnnn l'lmi. litltli, a citizen of the UnitedStates, and a resident of Toledo. in th ionntv of liucan and State ofOhio, have inventm a certain new and lawful .-\rtirlelrinding Machine:and 1 do ln'rtliy (lltllll'l ihr following to ho a full. r-lear. andexact description of lag invention. sin-h as will elmlile ntliitsskilled in the :\!'l to \vhirh i1 appertr-im: to make and usc the. aamc.rcl'mrnec lit-in; had to tho :ircoinpanying drawings, and to the(harm-tors of refervncr marked thercon, which form a part of this hlltlllt'lllltlll.

Thin inrcntion' relatea to work shining marhines and partienlm-ly to amac inc esperially (lt---'l;Illttl and adapted for trning up andgrinding the snrfm-cs of roller hoartugs.

The primary ()lijevt. of my inrc-ntion is the provision of an automaticmachineof tho character descrila'il. Wllltll is simple and eilieicnt inits cmistrnrtion and operation, and operahlc in a quick and rilii'ientmanner to snrrea ircly food hearings to tho grinding, mechanism, grindthem and then discharge thom, thcrrhy enhancing the practicability andcominorcinl value of ma rhinos of this character.

A. further object of my in ention is tho provision of simple andeilieirntmoelmniwm for intermittently l'cedin,t hooringzs or otherartirles to grinting position and holding each article firmly in Slltllposition during the grinding oporation.

A fm'thcr object of my nvcntion is the provision of simple and oflh-ientautomatic means for cooperating with the. article fooding and holdingmechanism to center each articlo preparatory to being ground.

A further olijcct of the invention is the provision of simple andautomatically operating means for cleaning the article centnring meansof accunmlatcd emery dust or other matter prior to eachccntcringopcration. i

A further object of my invention is the prnvision of means which isautomatically oporablc. to client a relative movementof ea'h articleafter being centered and of the grinding medium to grinding relation,and

vice vcrsa when the grinding has been'pcr-i formed.

Further objmts and advantages of tho invontion will ho apparent topcrsi'ins skilled in thc art from the. following dctailcd dcri 'ht endwort-ion of the machine with iarts broken away and in section and withthe lame. frame removed. Fig. 5 is an enlarged scct-ional \ltW of thebearing alining plmigor and assoeiatcd parts. Mg. 6 i5 a top plan viewof the right end portion of operative parts of the machine with porlionshrokcn away. F ig. 7 in an enlarged section on tho line 7. 7 in Fig. 4.Figs. 8 and 9 are enlarged sections on the lincs 8, 8 and 9. 9respectively, in Fig. 3, with parts in full. l igs. 10 and 11 are. topplan and front side. elevations of tho grinding \rhccl trimmingmechanism, with parts broken awav and in section and including portionsof t. ic hearing ojccting and chuck cleaning nicchanixms. Fig. 12 is anonlargcd sew tional view of the. hearing roratin arbor and its carriagowith a bearing field in grinding position. Fig. 13 is a broken t-ionalview of the portion of tho arbor and its driving moehanism differentfrom that shown in Fig. 12. Figs. 14 and 15 are diffcrcnt sectional ionsof the control means -for the bearing assouiated with the fccd magazine.Figs. 16, 17 and 18 are difi'crcnt views of the means which receives thebearings from the. magazine and moves them to arbor intrmlncingposition. I Figs. 19 and 9.0

are elevations of the ram locking clutch mechanism with parts brokenaway and vith the former in released and tho hitter in locked position.Fig. 21 is a section on the lineQl, 1 in Fig. with parts in fall.

v Fig. 22 is :1 pers active view of the rocker ram locking mcrn r of theclutch. Figs. 23 and 2% are sectional details of portions of tho clutchmechanism with the ram engagbearings, .which ma ing part in ram releasedand ram locking positions, respectively. Figs. 25 and 26 are enlargedsectional views of the trimmer mechanism taken res )ectively on thelines 25, 25 and .26, 26 in lig. 11. Figs. 27 and .28 are side views ofthe front and rear sides of the. cam ring. Fig. 29 is an inner end viewof the cam drmn, and Fig. 30 is a dian'anunatical view of the operatingcams illustrating the order in which the operating parts are broughtinto play during a cycle of operations of the machine.

This application is filed as a continuation of applicants priorapplication Serial No. (34,447, filed December 1, 1915.

In order that the detailed description of the machine embodying myinvention may be more readily understood, a. general description of thesame, in which the parts are not referred to by reference characters,will first be given, and particular attention in this connection isdirected to Figs. 1, 2, 3 and 4.

The machine which I have illustrated is articnlarly adapted for grindingroller earings, which bearings in the present instance are formed withconical body portions and at the large ends thereof with heads orenlargements. A quantity of these be renewed or added to at any time,are p aced in a magazine and automatically fed one at a time in properlytimed order to a receiver member, which, at a predetermined point in acycle of operations, is moved into bearing delivery osition, whichposition it maintains unti the bearing has been delivered therefrom.

' While the said receiver means is in this position a bearinglacing andholding ram is advanced throng the receiver and mtroduces the bearinginto the axial bore of a rapidly rotating arbor alining therewith. Theram continues its movement through the arbor until it has forced theenlarged head (portion of the bearin against an inturne flange orrestricte portion at the far end of the arbor, with the body portion ofthe bearing, which 15 the part .to be ground, projecting without thearbor end. As the bearing body emerges from the arbor end .it enters aregistering centering chuck in the inner end of an alinement plunger,

which afterward recedes from-the bearing preparatory to the grindingoperation. When the. ram has moved the bearing to grinding position ithas an additional clamping or bearing holding force applied thereto andis locked against releasing the bearing during the grinding o ierationby a suitable clutch mechanism, which is automatically brought into playat this stage in the operation. The arbor and cooperating bearingholding parts are now moved into position to place the body portion ofthe held bearing into peripheral grinding contact with an emery wheel orother suitable grinding medium, thus etl'ecting a grinding of theconical or tapered portion of the bearing.

Upon the completion of the. grinding operation the arbor and associatedparts are retracted from grinding position, the clutch mechanism isreleased from locking engagement with the bearing introducin and holdingram, and the ram as then withc rawn from the arbor and returned to itsoriginal inoperative position preparatory to introducing another bearinginto the arbor at the next cycle of operations. As the bearingintroducing ram recedes the alining chuck advances toward the arbor, airunder pressure is ejected through the alining chuck and into the arborbore to clean the same of any emery dust or other matter which may havecollected therein, and an ejecting ram then-advances through the arborfrom the bearin holding end thereof and ejects the gromu bearingtherefrom through the end of the arbor at which it was introduced.

- As the bearing leaves the introducing end of the arbor it drops into asuitable receiving receptacle provided therefor. The ejector ram recedesfrom within the arbor at the next hearing introduc ng movement of theintroducing ram, the Lwo rams, in the present instance, being connectedto and moved in unison by the same operating mechanism. A su ablemechanism for trimming. the work'rface of the. grinding wheel isprovided and, in the present instance, is manually operable wheneverdesired to effect a trimming of the grinding wheel.

Referring now more articularly to the detailed description of tiemachine, 1 designates the-base frame which is elongated in form and hasa frame part or bearing standard .2 mounted on the top of the left. endportion thereof for horizontal swinging movements relative thereto topermit an adjustment of the standard 2 relative to the base frame forthe purpose hereinafter described. The standard 2 is pivoted at itsinner or forward end to the top of the base frame 1, the pivoted means,in the present instance, comprising a stud 3. which rises from the topof the base. frame and enters an opening provided in a boss 4 projectingfrom the inner end of the. standard, as shown in Figs. 1, 3, 4 and 7.

A stud-shaft 5 is mounted in the upper portion of the standard 2. andthe stub end of this shift projects from the. rear side of the standardand has the hub portion 6 of a drum 7 mounted for free turning movementsthereon, as best shown in Fig. 9, said hub portion projecting toward thestandard 2 from the inner edge with a peripheral flange 8. which variesin depth throughoutits length to form a cam surface on which a roller(hereinafter referred to) travels,

whereby a rotating of the drum with respect to the roller will causethe. roller to have in ward and outward movements with respect to thedriun axis in accordance with the formation of the cam flange Theflange. 8 also varies in width and wx'iperates with a ring or hand i),that. is mounted on the outer edge portionof the drum periphery, to forma cam race-way 10, which extends entirely around the periphery of thedrum, and has one portion thereof oti'set axially of the drum from the.other portion for the purpose hereinafter described,

It is preferable to mount the ring or hand 9 on the. drum periphery in anninner to permit. a transverse adji ding thereof with respect to theram flange 8 to permit. a varying of the width of the. ranrwav 10 tocompcnsate for wear on the side. walls of the cam way. For thispurporx-v a ring ll is removably secured to the outer edge. of the drum7 by screws 12 and has its outer edge extending radially without theperiphery of the drum and approximately to the outer periph eral edge ofthe ring 9. The ring 11 is provided at suitable spaced pointstherearouml with pairs of screws 13, H, the. former of which passesloosely through the. ring ll and threads into the ring 9. while thelatter threads through the ring 11 and hears at its inner end againstthe outer edge of the ring 9. It is a parent that an ad justin r ofthese screws will eti'eet an iuljustuient oi the ring 9 relative to thedrum, and will also look the rin in such adjusted position.

1% wheel or ring member to is mounted on the inner end of the drum huh(S for turning movements therewith and is provided in the front and rearfates thereof with cam-ways 16 and 17, respectively, which extendentirely around the wheel. The. member 1a also has its peripheryprovided with an an- .aular series of teeth forming a spur-gear l8 andat one side of said teeth with a pcripheral cam surface. 19.

A shaft 20 is mounted in the standard 2 at the rear end thereof andcarries a pinion ll at one end in driving engagement with the gear 18and at its other end carries a pulley 22: which may he belted to anyconvenient driving meana, or the drum 7 and parts rotating therewith maybe driven in any other suitable or convenient manner.

A magazine for containing a plurality of articles to be operated on.hearings in the present instance. is carried by the standard 5. andcomprises a tube .23, which is (linpoued on an incline to permithearings placed therein to feed by gravity downward therethrough and hasits upper and disposed in convenient position for supplying mnringathereto. The tube 23, in the present instance, is carried by a castingor block member 24. which is mounted on a stud'25, projecting from thefront side of the stand and 2, said member being disposed intermediatethe ends of the tube and preferably adjacent to its lower or dischargeend. Projecting through the member '24 transversely of the tube andthrough the standard 2 are a pair of plungera 26 and 27, which arerespectively provided at their inner ends with rollers 23 and 2%). ("amprojections and ill are. provided in the. inner or front end of the drumhub 4'5 in position to respectively court. with the plunger rolls 12hand .29 at redetermined p ints in a rotation of said iin-li, there yimparting properly timed outward movements to the respective plungers.Each plunger ill, 27 is yieldingly held in cam engaging position by acoiled GUllipl'Oasion spring 322, which is mounted thereon within themember l-l and has its opposite ends thrust against said member and acollar on the plunger, as shown in Fig. 15. The outer end of the plunger96 is provided with an arm 33, which carries an inwardly projecting pin34 that extends through a registering opening in the member 24 andenters the bearing feeding passage of the magazine. as shown in Fig. 14.\Vhen the plunger 26 is in its normal position the linger 34 projectswithin the magazine passage in posi tion to'ohstruet the passage ofhearings therethrough. and upon an outward movement of the plunger, whenits roller 28 is struck by the cam 30. the. pin is withdrawn fromhearing obstructing position. The plunger 27 is provided at its outerend with an arm or plate 3:) having a finger 36 projecting inwardtherefrom through a regi=itering opening in the member 24 and into themagazine passage. at a point below the. tinger'Bt, the space betweenthe. two fingers bemg SIIlllClQ-Dt, to aeeounnodate the. length of ahearing which bearings are designated (1..

When the plunger 27 is tripped by an engugemeut of the ram 31tin-.rewith the finger 36 is momentarily retracted from hearingobstructing position and permits the hearing, which is disposed betweenthe two lingers, to pass down through the magazine and into the receivermember of the machine. The tripping of the two plunger-s 2th '37 by therains t" and 31 is so relatively timed that the plunger 27 will limt hedropped to release the lowermost bearing a. and after said plunger hasreturned to its normal position. the plunger 26 is tripped to release.the supported column of bearings within the magazine and to permit suchcolumn to advance the length of one bearing, or until the lowermostbearing of the column has moved into atop contact with 'the' lower atoplinger 36: the plunger 20 then returns to normal position to anpportall'uxeept. the lower hearing of the column preparatory to the nexthearing dropping increment of the finger 86.

The fingerflmny be adjusted lengthwise ill) of the magazine with respectto the finger Jill, to accomnaalate bearings of ditierent. lengths, byplacing the tin'ger 34 in any one of the sets of openings 37 providedtherefor in the arm 33 and member 24.

The. receiver means, into which the bearings are successively deliveredby the magazine 23, comprises a lever 38 that is pivotally mounted on astud 39 (Figs. 7 and 9), which projects from the. forward or right endof the standard 2 lengthwise. of the machine and adjacent. to the loweredge plane of the gear ring 1."). The lever 38 projects transversely ofthe machine and 18 provided at. its inner end with a roller A, the axisof which is transverse to the rockirf. axis of the. lever, and whichbears upwind against the eanrsurface 19 of the gear ring by reason ofthe greater weight of the outer end of said lever. The. lever 38 isprovided at its outer end with a pair of jaws 40 that are respectivelypivoted to the lever, as at 41, to have opposed opening and closingmovements. the jaws eing normally retained in closed position by the.action of respective springs 42 thereon, which springs are carried bythe pivots 41. The jaws 40 cooperate to form a bearing receiving openingor passage 43, which extends transversely of the lever and registerswith the discharge end of the magazine 23 when a bearing is dischargedtherefrom. At a predetermined point in a rotation of the gear ring 15the roller A enters a depressed portion 19 (Figs. 1. 3 aml 7) in the camsurface 19, and permits a lowering of the outer end of the lever 38 intoposition to place the bearing receiving passage 43 thereof intoalinement with an axial passage 44 provided in an arbor 45. When thebearing carrying'end of the receiver means has been lowered into thisposition, which is its delivery position, the bearing carried thereby isdisclutrgedthercfrom and introduced into the arbor passage H by theforward movement of a ram 46, which movement of the ram, in the presentinstance, is lengthwise of the machine from left. to right thereof. Thelever 38 is provided at its outer end with a transversely projectingfinger 38', which, when the lever is lowered, courts with a registeringblock or boss 2 on the bearing standard 2 and limits the loweringmovement of the lever irrespective of the amount of drop permitted bythe depression 19 in the cam surface 19.

The arbor 45 is rotatably mounted in bearing bushings 47, 48, which inturn, are mounted in openings provided in the left and right sides,respectively, of a carriage frame 49. The arbor receiving opening in thebushing 48 is preferably comcallv enlarged at its outer end, as at 50,to receive the respective (sonically enlarged end portion of the arbor45, whereby a pressure exerted lengthwise of the arbor toward its leftor rear end will maintain the conical end of the arbor in close bearingeontact'within the .conical end portion 50 of the bushing 48, therebycompensating for wear and preventing any lateral play of the conical endpoi-ton of the arbor within thebush ng, or in other words, pernmnentlymaintaining the outer end of the arbor passage H in centcrer relation tothe hearing. A belt pulley 51 is keyed to the arbor 45 within thecarriage frame 49 and between the bearing bushings 47 and 4S and has abelt 51" leading therefrom to any suita le source of power whereby rapidrotation is communicated to the arbor. A friction plate of annular formis disposed between the lmb of the pulley 51 and the adjacent end of,the bushing 48 and is muzhored to the pulley to have rotation therewithby one or more pins 53 projecting from the pulley. These pins, however,permit the plate to have. free axial movements relative to the pulley(see Fig. 12). A plurality of coiled compression springs 54 are mountedin sockets provided in the hub portion of the pulley 51 lengthwisethereof (see Fig. 13) and have their outer ends thrust against thefriction plate 52 and their inner ends thrusts against the bases of thesockets. It is thus apparciit that the springs 54 apply opmrsed thrustsagainst. the inner end of the bushing 48 aml the arbor 45, therebyserving to pernumcntly maintain the conical end of the arbor in closebearing and centering contact within the conical portion 50 of saidbushing.

A bearing holding nipple is removably mounted in the forward or outerend of the arbor 45 in axial register with aml forming a continuation ofthe )assage 44 through the arbor, and this nipple is removably heldwithin the arbor end by a bushing or collar member 56, which threadsinto an enlarged end portion of the arbor passage, as best shown in Fig.12. The nip )le. 55 has out ward shouldering contact with the bushing'56 and is removable from such bushing through the inner end thereof.The outer end of the nipnle 55 is provided with an inill) wardlyprojecting flange 57, which restricts the. outlet end of the passagetheretln-ough and forms an abutment against which the flanged orenlarged head portion of a bearing a has outward thrust contact underthe action of the ram 46, as hereinafter more fully described.

The carriage 49 is mounted on the shallow forward end portion 2" of thebearing standard 2 for movements transversely thereof, and is held tothe hearing standard and has its movements relative thereto guided bydove-tailed tongue and groove connection, as

shown at 58 in Figs. 3 and 4. 59 designates a tapered bar which isdisposed between the tongue and groove connection 58 at one side.thereof and 1s capable of adjustment lengthhruckot' urm tit) from whir-ithv wise of said connection to take up any vrnr occurring: therein as iswait nmlnramml u tho nnurhine art.

The ruin it is loonvly nnd rotund'ly rur ricd at. its rrnr \"tlki h anarm no. whi=-h inojeoh upward from n hnr 4"! that r-Xtondr theoutirllength of tho nnz -hiutand i: niouutucl at its roar rtnl innitaddr l'uzirinr provided in. tho lon'vr how portion oi tin ht-ilringstandard for rrri n'ouutm'y worriuenbt lengthwi -o uii tho zuzu-l inr.'lh oi'hor end oi the lmr (ii in mooutt-d in would. hearings proridod intho i'U'W'di'tl r ri' ht hand end portion of tin inm-hinr. :n' hrrwinuftrr duscrihrd. 'lhtrozn iii i,--: tm't'lwi tho urln (in :i-l; l l''i ltl wi h tho tltlr'htlfl'll 44 through tho n h-ir if) and i i7p orrrdin udruncu. of tho u rm ii or li-rhrr'nu said urn: and the mljn entt'nd. ot the nrl-or $7, 1- n houring nrln tiL \Yhlt'h proiorts. in thoh-t't and thou upward from i'l-n- :zdim' nt i-he of tho nrhor rurringr4i". 'llzr ruusuppru'iing: or guiding por ion of tho min it is Spurodfrom tho rrm -nd of tho nrhor u suituhlo tllhilUK't' to pm mil nlmvoring of tho hvnriug: rnroiriu-, jun's: i0. i0 iln'rt-ht-tn'm-n. andtho rain, n'hrn at tho limit of in rrnr- \Vtllll niurruu-nt, standsatthe roar oi tho hearing rewiring inns it). i so not Eu ohstruct tholowt-ring movmm-nt oi urh iufn's into hearing dolivonr pos tion.

The NIL-H1154 t'll\|)it) \'0tl for controlling the. movements of the rumit) and bar (it. to which it is attached. will now he (l\"2-'(l' "."(l.A shaft ()3 (Fig. 8) is \nouutvd for rocking movements in tho rrnr endportion of" the. hearing. standard 9 and rnrrirs. u rnlhu' li nt'. one.side thereof nod \r'uhin tho rum rum Wny 16 of the rotntnhln' menihr-riii. whilo the downwardly projvrtiug arm of .-=:\id lover is: prm'idrdat its lower and with n sogmoutul rnrk (h'n which lilt'filltfl with undhou rorkwl imports rotznry rt-cipromitorr tuowmonts to u pinion 66 andtho Fllllft- '7 (in which it is mounted. The. shaft- 67 is mmmtrd in asuitable hearing 68 prori lrd in tho. lniso poo ti'on of tho hvnringstandard *2 udjnront to tho loft hand rnd tin-ro t. Kort-(lit) theforward end of tho shaft 67 is on upwnrdly projut-ting rookrr arm .7,tho upprr rod of which has oonut-rtion through at bur or link member 70with the l)tl-(\ mrtion 0.0 of tho rnrn 46 projects. It is thusrridontthat. a rocking of tho arm tit) will onunnnuionto roviprtwntorymovements to tho hruokrt I'm (3 und lmi 1 by which it in curried. Thehnso portion tit)" of the bracket. III!!! in onrrivs a t-ollnr 71 at ouonido thereof. whirh rolhu' trau'oh-i in tho vhunnui of n horizontallydih'poood guillolmr 7:2 nod ronotr. with said guidibit! to rolivw thotmr til of hiturnl proxnuro Wilit'lt might. otlu-rn'iso ho importedthvruto hy wunon of tho nughof thrust of tho link 70 with rospt-ut totho plnnc. of movement. of

the.- har 31. in: gnidedmr i2 is carried by suitnhlo hrnrln th i' n hichare; fixedly suunri-d to and rna- From-tho lmht portion of :hthomingatundurd or i'rnuw port '2.

'l'lnram '11 1 3 is of truo rirrulnr form. in tin prvr'rnt aintnnw. for'irurly throw ttlitll'lti": of it: irtlp'tii. llF-ilttlicllili ul ltrthrnrii pr -u'hhd with on inn'nrdi projvrt'iug vii!!! p-olmn i i"loading to a short m-ntrul ponimz H (from \\'l lt'll the raun exi -unis'r:olunii x' outinnrd, or at 16" to tho :nli tin" prolougotl u-iaulrnlportion l u ti-o rum portion oi the groove in tho pun-rut ustuzn'znrxtrnding hotn'rru tin: inn- 11. lndrum T and ruin-ring is) turn int'lKH'lU\i--| dirortion. us indirulrd h t!l' \5 in i. nod s that th munllvr lf- (rut lin room: l-rl(n'l "im'- ilil'r-flion. in tho growt- 1'and upon leaving tho girolongrd nvutrzzl portion i i thoruoi Pilhfil'.through .itim utrnui portion Iii to tho :hort ut-uirul porti n H3". inn'hirh lnttol {hm'liilul thr our i und thir.--.m 44.) are a tho limit:oi tiu-ir rt-nrivnrd or rrtrnrting lHUi'tlHtllin', During: t'htshortperiod of rust of the rznn 4h nod ussovmttul ports whilrho rauu rollrr iis in tho nrutrnl portion 16 of its ru n way. tho hearing rouiivingjawit). it) lnwor into pmitinn for tho honrinn ri- .-t-i\ in; wning iiithou-in to iinll registor with tho m-n iii. .wlu-h lon'criug inovrmootof tho '\"'\i\(-i' l ving due to the inn rolher A in tho 'wt'irrrnit-nus entering tho drprossod portion H) of tho mil Slll'flit 1H. 'lhorrt'riYt-r nmuura hnring loworud to delivory position. tho "hilt roilor1i lruvrls outward through the ruin portion .h" of its ruin-Wu). and thorot-king movriurnt Which is thus iuipurtrd to tho lovrr 4-, rotntvs tho.shuft 37 in r-lorluviso dirrrtion nod ronuuuni -nth a full forwardsirokv to thv hu'." (H and ram H 'l'hi-v forward stroke of the rain 46oli'r 'tn :U k'lt't'ilflli from tho ri-rc-ivi-r minim of tho hcnrin;ronlninvd thrroin and forces tho hearing through tho rvgistnring pnxsngn44 of tin: iu'lun od with its thingrd or onhn gotlrnd in onrurt with theinwardly ihlugrd outvr rnd portion of tho nrhor nipplo 5:), in \rhirhposition tho hearing stands with itsronirul hody portion projovtcdhoyond thuu-djuri-nt nrhor and in grinding poh'itiou, us shown in Fig.1'2. The roller It onion: tho prolongml oontrni portion 16' of 'itsgrooro Hillilliiullttflls with tho moving of tho rain into tho hearingholding position shown in Fig. 12. and tho rum is muintnincd in suchhoidiug position during the trawl of tho rolh-r it through the entireh-ugth of tho noutrul portion to" of its mun \vny, us is nppzirvnt. -hnniovt-lurntof tho urhor run rnlgo 4 9 mm grinding position, tho grindingof tho hearing nud tho rvtnrn of thi-v cnrringo to its nornnil positionnth;- luuduring tlutrurrl tluroller l? in tho ut-utrul portion 16" of usemu wu-y, and when this is, 0012\-

